500 and 508 server error due to wordpress server overloading

please i need help to resolve issues with my wordpress site. its very slow such that it take minutes to load product page, cart page and other woocommecerce frontend pages. sae as the backend too.

sometimes it will crash to displaying 500 error code or 508 error code and i found out that it usually consume the server CPU and Physical Memory .

I found out that in the server error log, theres a consistent errors which are;

1. Latest web server error log messages:

[Mon Mar 03 10:23:03.431253 2025] [access_compat:error] [pid 1280542:tid 1280778] [client 89.58.42.64:42058] AH01797: client denied by server configuration: /home/hairssen/public_html/xmlrpc.php
[Sun Mar 02 23:21:10.547649 2025] [access_compat:error] [pid 2823309:tid 2823464] [client 46.203.28.235:53171] AH01797: client denied by server configuration: /home/hairssen/public_html/xmlrpc.php
[Sun Mar 02 23:20:59.369496 2025] [access_compat:error] [pid 2823198:tid 2823284] [client 103.101.90.22:55263] AH01797: client denied by server configuration: /home/hairssen/public_html/xmlrpc.php
[Sun Mar 02 23:20:37.232566 2025] [access_compat:error] [pid 2823307:tid 2823346] [client 188.213.1.215:37373] AH01797: client denied by server configuration: /home/hairssen/public_html/xmlrpc.php
[Sun Mar 02 23:20:26.689408 2025] [access_compat:error] [pid 2823198:tid 2823287] [client 45.146.30.181:38589] AH01797: client denied by server configuration: /home/hairssen/public_html/xmlrpc.php……………………………………..and it continued like that

2. Latest suEXEC event log messages:

[2025-03-03 11:21:15]: uid: (1460/hairssen) gid: (1462/hairssen) cmd: ea-php82
[2025-03-03 11:21:12]: uid: (1460/hairssen) gid: (1462/hairssen) cmd: ea-php82
[2025-03-03 11:21:09]: uid: (1460/hairssen) gid: (1462/hairssen) cmd: ea-php82
[2025-03-03 11:21:01]: uid: (1460/hairssen) gid: (1462/hairssen) cmd: ea-php82
[2025-03-03 11:20:53]: uid: (1460/hairssen) gid: (1462/hairssen) cmd: ea-php82
[2025-03-03 11:20:52]: uid: (1460/hairssen) gid: (1462/hairssen) cmd: ea-php82
[2025-03-03 11:20:43]: uid: (1460/hairssen) gid: (1462/hairssen) cmd: ea-php82
[2025-03-03 11:20:43]: uid: (1460/hairssen) gid: (1462/hairssen) cmd: ea-php82
[2025-03-03 11:20:42]: uid: (1460/hairssen) gid: (1462/hairssen) cmd: ea-php82………………………………………and it continued like that

The page I need help with: [log in to see the link]